Hurter and Driffield actinograph

Made:
1885-1920 in Widnes
maker:
Hurter and Driffield

Hurter and Driffield Actinograph. Small mahogany box containing exposure calculator, slide rule type. Scales for plate speed: 0.5-300 H&D. Exposure time: 0.05-60secs. Aperture: f/2.8-65 52 degrees 30' 0".

Details

Category:
Photographic Technology
Object Number:
1990-5036/2624/1
Materials:
brass (copper, zinc alloy) and mahogany (wood)
Measurements:
overall (closed): 72 mm x 114 mm x 34 mm,
type:
actinograph
taxonomy:
  • measuring device
  • light measuring device
  • actinometer
credit:
The Kodak Collection at the National Media Museum, Bradford